// Force SPWRITE. This function doesn't actually write SP,
	// but it is called with a special calling convention where
	// the caller doesn't save LR on stack but passes it as a
	// register (R5), and the unwinder currently doesn't understand.
	// Make it SPWRITE to stop unwinding. (See issue 54332)
	// Use OR R0, R1 instead of MOVD R1, R1 as the MOVD instruction
	// has a special affect on Power8,9,10 by lowering the thread 

		}
	}
	return gp.m.lockedExt, gp.m.lockedInt
}

//go:noinline
func TracebackSystemstack(stk []uintptr, i int) int {
	if i == 0 {
		pc, sp := getcallerpc(), getcallersp()
		var u unwinder
		u.initAt(pc, sp, 0, getg(), unwindJumpStack) // Don't ignore errors, for testing
		return tracebackPCs(&u, 0, stk)
	}
	n := 0
	systemstack(func() {
		n = TracebackSystemstack(stk, i-1)
	})
	return n

		// for that memory to get freed.
		KeepAlive(ep)
		return
	}

	// stack
	if gp := getg(); gp.m.curg.stack.lo <= uintptr(p) && uintptr(p) < gp.m.curg.stack.hi {
		found := false
		var u unwinder
		for u.initAt(gp.m.curg.sched.pc, gp.m.curg.sched.sp, 0, gp.m.curg, 0); u.valid(); u.next() {
			if u.frame.sp <= uintptr(p) && uintptr(p) < u.frame.varp {
				found = true
				break
			}
		}

	cb(frame)

	if raceenabled {
		racereleasemerge(unsafe.Pointer(&racecgosync))
	}

	// Do not unwind m->g0->sched.sp.
	// Our caller, cgocallback, will do that.
	restore = false
}

func unwindm(restore *bool) {
	if *restore {
		// Restore sp saved by cgocallback during
		// unwind of g's stack (see comment at top of file).
		mp := acquirem()
		sched := &mp.g0.sched

}

// populateSeh generates the SEH unwind information for s.
func populateSeh(ctxt *obj.Link, s *obj.LSym) (sehsym *obj.LSym) {
	if s.NoFrame() {
		return
	}

	// This implementation expects the following function prologue layout:
	// - Stack split code (optional)
	// - PUSHQ	BP
	// - MOVQ	SP,	BP
	//
	// If the prologue layout change, the unwind information should be updated
	// accordingly.

	// other threads, so mp is usually not getg().m.
	// In fact mp may not even be stopped.
	// See golang.org/issue/17165.
	getg().m.mallocing++

	var u unwinder
	var stk [maxCPUProfStack]uintptr
	n := 0
	if mp.ncgo > 0 && mp.curg != nil && mp.curg.syscallpc != 0 && mp.curg.syscallsp != 0 {
		cgoOff := 0
		// Check cgoCallersUse to make sure that we are not

		t.Fatalf("child process did not produce a crash report")
	}

	// Parse the PCs out of the child's crash report.
	pcs, err := parseStackPCs(crash)
	if err != nil {
		t.Fatal(err)
	}

	// Unwind the stack using this executable's symbol table.
	got := formatStack(pcs)
	want := `redacted.go:0: runtime.gopanic
traceback_system_test.go:85: runtime_test.child7: 	panic("oops")

				os.Exit(2)
			}
			if !filepath.IsAbs(p) {
				if cfg.Getenv("GOPATH") == "" {
					// We inferred $GOPATH from $HOME and did a bad job at it.
					// Instead of dying, uninfer it.
					cfg.BuildContext.GOPATH = ""
				} else {
					counterErrorsGOPATHEntryRelative.Inc()

	re(`-W`),
	re(`-W([^@,]+)`), // -Wall but not -Wa,-foo.
	re(`-Wa,-mbig-obj`),
	re(`-Wp,-D([A-Za-z_][A-Za-z0-9_]*)(=[^@,\-]*)?`),
	re(`-Wp,-U([A-Za-z_][A-Za-z0-9_]*)`),
	re(`-ansi`),
	re(`-f(no-)?asynchronous-unwind-tables`),
	re(`-f(no-)?blocks`),
	re(`-f(no-)builtin-[a-zA-Z0-9_]*`),
	re(`-f(no-)?common`),
	re(`-f(no-)?constant-cfstrings`),
	re(`-fdebug-prefix-map=([^@]+)=([^@]+)`),
	re(`-fdiagnostics-show-note-include-stack`),

			ctx.file = &bytes(file)[0] // assume NUL-terminated
			ctx.off = pc - fi.entry()
			ctx.res = 1
			if u.isInlined(uf) {
				// Set ctx.pc to the "caller" so the race detector calls this again
				// to further unwind.
				uf = u.next(uf)
				ctx.pc = uf.pc
			}
			return
		}
	}
	ctx.fn = &qq[0]
	ctx.file = &dash[0]
	ctx.line = 0
	ctx.off = ctx.pc
	ctx.res = 1
}